Magnetic domain formation in perforated permalloy films

Citation
U. Welp et al., Magnetic domain formation in perforated permalloy films, APPL PHYS L, 79(9), 2001, pp. 1315-1317
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
0003-6951 → ACNP
Volume
79
Issue
9
Year of publication
2001
Pages
1315 - 1317
Database
ISI
SICI code
0003-6951(20010827)79:9<1315:MDFIPP>2.0.ZU;2-J
Abstract
The magnetization behavior of permalloy films containing a square array of holes has been studied using magnetometry, magneto-optical imaging, and mag netic force microscopy. Two types of domain boundaries are observed. The ho le array induces a strongly pinned, complex domain structure on the microsc opic level (i.e., within one unit cell of the hole array). We show that mag netization reversal occurs through the nucleation and motion of a domain wa ll that separates areas of oppositely polarized microscopic domain patterns . These walls display highly mobile kinks that induce the reversal of the m icroscopic patterns. The interplay between intrinsic anisotropy and pinning by the hole array induces a pronounced anisotropy in the domain patterns a nd switching mechanism. (C) 2001 American Institute of Physics.